11385328538 has 4 divisors (see below), whose sum is σ = 17077992810. Its totient is φ = 5692664268.

The previous prime is 11385328531. The next prime is 11385328547. The reversal of 11385328538 is 83582358311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83582358311 = 50221 ⋅1664291.

It can be written as a sum of positive squares in only one way, i.e., 8113145329 + 3272183209 = 90073^2 + 57203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11385328492 and 11385328501.

It is not an unprimeable number, because it can be changed into a prime (11385328531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2846332133 + ... + 2846332136.

Almost surely, 2^11385328538 is an apocalyptic number.

11385328538 is a deficient number, since it is larger than the sum of its proper divisors (5692664272).

11385328538 is an equidigital number, since it uses as much as digits as its factorization.

11385328538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692664271.

The product of its digits is 691200, while the sum is 47.

The spelling of 11385328538 in words is "eleven billion, three hundred eighty-five million, three hundred twenty-eight thousand, five hundred thirty-eight".